Fort Jones, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 2.4 °C (low) to 19.5 °C (high). Annual precipitation averages 552.7 Millimeters. Fort Jones is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.1 °C | 7.9 °C | 101.09 mm |
| February | -2.2 °C | 11.1 °C | 75.44 mm |
| March | -0.9 °C | 14 °C | 58.17 mm |
| April | 0.8 °C | 17.3 °C | 39.62 mm |
| May | 4.1 °C | 22.6 °C | 26.92 mm |
| June | 6.6 °C | 27.2 °C | 17.27 mm |
| July | 10.1 °C | 32.6 °C | 10.67 mm |
| August | 9.2 °C | 32.3 °C | 10.16 mm |
| September | 6.6 °C | 28.6 °C | 7.87 mm |
| October | 2 °C | 21.3 °C | 32.26 mm |
| November | -1.7 °C | 12.3 °C | 65.02 mm |
| December | -3.1 °C | 6.8 °C | 108.2 mm |
| Annual | 2.4 °C | 19.5 °C | 552.69 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |